I can't seem to remember this particular word/phrase. I'm almost certain it's a two-word phrase. It specifically refers to someone who is skilled with the ladies, ie, someone who knows the tricks of the trade.

Usage:
- "Unless you're a X-Y, that's not going to work with her."

Edit :
I'm not looking for 'ladies man', 'casanova', 'womanizer' etc.
This phrase refers to someone who's more of a pro and one who is serious about his business.

10 Answers
10

This used to be a synonym for a "ladies' man," someone who was good at the skills and techniques of seduction.

However, it's recently begun to be associated with a specific subset of extremely creepy people who use a specific range of extremely creepy techniques to pick up women. If you are talking about people taking things "seriously," this might be what you mean--but you should be aware that most people now consider "pickup artist" to also carry the strong implication of being highly misogynistic and a borderline psychopath.

Someone who has a very rare ability to say all the right things at the
right time. Even when a situation is not in their favor, by the end of
the night their uncanny ability with words has turned a unfavorable
situation into an advantage. They are charming and possess all the
people skills then some, they can talk their way out of or in into
anything they want. Even more deadly if the person is hot.

A smooth-talking charmer who has mastered the art of finding, meeting, attracting and seducing beautiful women into the bedroom. One he accomplishes his goal, he leaves the woman in fear of having a relationship and proceeds to find his next conquest.

Welcome, Tony. This answer could be more useful if you tell us a little more. For example, you could define the term or explain why it is a good fit for the question. (If you're trying to evade the character minimum, that's a sign that your answer needs to be fleshed out a little!)
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aedia λApr 25 '14 at 20:40

To match a couple of the other entries, I might have said "Is 'Don Juan' what you're looking for?" or "Perhaps: He is a real Don Juan." I don't think the extra words would have contributed much to the sense of my reply, though. Not sure why I got downvoted and they didn't. At any rate, the OP was trying to remember two words that refer to someone "skilled with the ladies", not an explanation of what the words mean. With that in mind, I tried to provide as pithy an answer as I could. I do try to be pithy.
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TonyApr 26 '14 at 1:32

These are all fair points to make, actually (and indeed there have always been requests to lift the character limit for single-word requests). That said, now that the downvote is here, it just ain't going away unless the answer is edited. It technically can't. (And seeing how you didn't actually drop the ball and came back to explain yourself in a 101-word comment, a 5-word edit would have been just as easily possible.) Trying to be pithy is fine. The thing is, the answer in its current form actually is not pithy anyway, and indeed 83% of it is plain off-topic.
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RegDwigнt♦Apr 27 '14 at 12:23

I added some different noise words to the answer. I don't mind downvotes, by the way. People will have their opinions and reactions. Anyway, I do think I contributed to the list of possible answers to the OP's question. That is what I was trying to do.
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TonyApr 27 '14 at 16:46